Towards Biological Supramolecular Chemistry: A Variety of Pocket‐Templated, Individual Metal Oxide Cluster Nucleations in the Cavity of a Mo/W‐Storage Protein

Abstract

The authors of this recent Communication would like to clarify some points with respect to the trinuclear tungsten cluster shown in Figure 3 therein: The cluster shows a central classical W 3 O 10 N 3 unit with the characteristic coordination number 6 for the three metal atoms, while each of these has a "dominant" contact to a His139 group. Whether terminal oxygen atoms are protonated cannot be decided as mentioned in the paper (this also because of the limited accuracy of the WO bond lengths). In any case, the charge of the W 3-type cluster was wrongly formulated (see text and legend to Figure 3) and cannot be given because of the protonation problem.

Chiral tetranuclear and dinuclear copper(ii) complexes for TEMPO-mediated aerobic oxidation of alcohols: are four metal centres better than two?

“…12-17 However, the types of organic ligands exploited in the copper catalyst systems are still limited and the structures of copper catalysts involved in the catalytic process are rarely explored. [17][18][19][20] The construction of metal-organic cluster compounds through self-assembly of predesigned ligands with appropriate metal ions is a prime research topic [21][22][23][24][25] Herein, we report the one-pot syntheses and crystal structures of two tetranuclear and dinuclear copper(II) complexes resulting from the in situ synthesis of chiral Schiff base ligands (Scheme 1), and their catalytic applications in the TEMPO-mediated aerobic oxidation of benzylic alcohols. The catalytic potential of two complexes is compared based on their catalytic performance in various alcohol oxidation reactions, suggesting that the copper(II) complex with a Cu 4 core is a more efficient catalyst than that one having a Cu 2 core.…”

“…[12][13][14][15][16][17] However, the types of organic ligands exploited in the copper catalyst systems are still limited and the structures of copper catalysts involved in the catalytic process are rarely explored. [17][18][19][20] The construction of metal-organic cluster compounds through self-assembly of predesigned ligands with appropriate metal ions is a prime research topic [21][22][23][24][25] due to the advantages in catalysing useful chemical transformations, in contrast to simple monometallic complexes. [26][27][28][29][30] Schiff base type ligands are excellent ligand candidates for high-nuclearity metallosupramolecular assemblies, in particular in cases where additional O-donor atoms have been introduced to the backbone of a Schiff base ligand scaffold.…”

Bacterial PerO Permeases Transport Sulfate and Related Oxyanions

“…R. sphaeroides, S. meliloti, and A. tumefaciens possibly produce siderophores that bind and thus detoxify excess HMO in the medium, as shown for Azotobacter vinelandii (20). It is noteworthy that none of these strains has a homolog of the A. vinelandii Mo/W storage protein MosAB, which binds up to 100 Mo or W atoms as polyoxometalates (21,22). The two Rhodobacter strains have Mop-type Mo storage proteins (23), which are absent in S. meliloti and A. tumefaciens.…”

Polyoxometalate‐Mediated Self‐Assembly of Single‐Molecule Magnets: {[XW9O34]2[MnIII4MnII2O4(H2O)4]}12−

“…Although several POM-based systems with high spin ground states or significant magnetic anisotropy are known, [18] (2). The cluster anions in 1 and 2 are structural analogues and differ only in the heteroatoms X that are central to the {XW 9 O 34 } fragments (X = Ge in 1, X = Si in 2), see Figure 1.…”

“…

Polyoxometalates (POMs), anionic oxide clusters of the early transition metals, [1] represent a vast class of inorganic materials with a virtually unmatched range of properties applicable to biology, [2] magnetism, [3] materials science, [4] or catalysis. [5] This unique span of properties qualifies POMbased materials as prime candidates for the designed construction of electronically interesting materials.

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